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Sphaerodactylus monensis MEERWARTH, 1901

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Higher TaxaSphaerodactylidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common NamesE: Mona Geckolet, Mona Least Gecko 
SynonymSphaerodactylus macrolepis var. monensis MEERWARTH 1901: 20
Sphaerodactylus monensis — STEJNEGER 1904: 607
Sphaerodactylus monensis — BARBOUR 1937: 112
Sphaerodactylus monensis — WERMUTH 1965: 170
Sphaerodactylus monensis — THOMAS & SCHWARTZ 1966: 232
Sphaerodactylus monensis — SCHWARTZ & HENDERSON 1991: 510
Sphaerodactylus monensis — KLUGE 1993
Sphaerodactylus monensis — RÖSLER 2000: 113 
DistributionAntilles: Isla Mona

Type locality: Isla Mona, Antilles.  
TypesSyntypes: lost (destroyed, formerly ZMH), fide SCHWARTZ & HENDERSON 1991: 510) 
DiagnosisDESCRIPTION: Size moderate (SVL in males to 30 mm, in females to 30 mm); dorsals very large, acute, strongly keeled, flattened, imbricate, axilla to groin 23-32; no area of middorsal granules or granular scales; ventrals smooth (usually) to keeled anteriorly, cycloid, imbricate, axilla to groin 22-32; dorsal caudal scales keeled, acute, imbricate, flat-lying, ventral caudal scales smooth, cycloid, enlarged midventrally; snout short, rather broad; snout scales large, broad, swollen, juxtaposed; 2 postnasals; 1-3 (mode 1) internasals; upper labials to mideye 3; gular scales usually keeled, rarely smooth; chest scales smooth to completely keeled; midbody scales 42-51; escutcheon short and compact with extensions onto thighs but never reaching knees, 4-7 x 9-18. Not sexually dichromatic; dorsum chocolate to gray-brown, with dark brown dorsal markings varying from isolated dark scales to almost a dark reticulum composed of individual darker scales; a black scapular patch, prominently outlined with very pale gray and including an irregular and often transversely elongate pair of very pale gray ocelli; a dark, prominent sacral U; head pattern not bold, consisting of: (1) a pair of dark brown, preocular lines on snout (usually joined to form reversed V), and (2) a pair of brown postorbital lines extending onto neck, often enclosing grayish brown diamond, incised medially by vague, brown occipital spot; no nuchal spots; throat immaculate pinkish gray; venter gray to yellowish; tail unicolor, with a pair of longitudinal dorsal lines, or spotted with darker pigment; iris brown to gray-brown (from Schwartz & Henderson 1991: 510). 
CommentAbundance: only known from type locality (Meiri et al. 2017). 
EtymologyNamed after the type locality. 
  • Barbour,T. 1937. Third list of Antillean reptiles and amphibians. Bull. Mus. comp. Zool. Harvard 82 (2): 77-166 - get paper here
  • Meerwarth, H. 1901. Die westindischen Reptilien und Batrachier des naturhistorischen Museums In Hamburg. Mitt. Naturhist. Mus. Hamburg 18: 1-41. - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Rösler, H. 2000. Kommentierte Liste der rezent, subrezent und fossil bekannten Geckotaxa (Reptilia: Gekkonomorpha). Gekkota 2: 28-153
  • Schwartz, A. & Henderson, R.W. 1991. Amphibians and Reptiles of the West Indies. University of Florida Press, Gainesville, 720 pp.
  • Stejneger, L. 1904. The herpetology of Porto Rico. Rept. United States Natl. Mus. 1902: 549-724. - get paper here
  • Thomas, R., and A. Schwartz. 1966. Sphaerodactylus (Gekkonidae) in the greater Puerto Rico region. Bulletin of the Florida State Museum, Biological Sciences, 10:193—260 - get paper here
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